关键词: 航道通航, 分布式组织, 地理信息, 可扩展标记语言, 多源异构数据, 可视化表达

Abstract:

In order to solve the semantic independence and heterogeneity of GIS data resources in channel, the paper analyzed the structure and management mechanism of metadata and proposed a distributed spatial data organization storage method based on XML. According to the level and relevance of the geographical location distribution of the main elements of the channel, the method established a spatiotemporal integrated data storage model with spatial reference. On this foundation, the paper realized visualization of spatial and temporal data, which applied such as spatiotemporal GIS multidimensional modeling technology, terrain scene construction technology, discrete observation data interpolation technology, etc. Taking the upper reaches of the Yangtze River as an example, multisource heterogeneous data fusion organization was realized and an application system was developed based on threetier technical architecture, which was applied to ship navigation and auxiliary decisionmaking successfully. Application results show that the study can effectively solve the difficulties of data organization and visualization in complex waterway environment, and provide security guarantee and support for ship navigation.

Key words: channel navigation, multi-source heterogeneous data, visualization, XML, distributed organization, GIS